{
  channelsNixosStable = {
    ref = "nixos-18.09";
    rev = "c2950341d038995bf46a7b72db961bb3d3e9ac12";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "44b02b52ea6a49674f124f50009299f192ed78bb";
  };
}